To help the OP, I need to reference a Duo-RX with PCB code PWA-3365-A.
It'll take too long for me to import one, so if someone here has access to a RX and can send some pics and confirm a few part values, I'll gladly pay you for your time.
OR if you have a Duo-RX for sale (dead or alive) in the US, I might be game for that as well.